﻿using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace Zhjt.Comm.Lib.Tools.WebTools
{
    public class HttpClientTools
    {
        /// <summary>
        /// get请求
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string Get(string url,string contentType= "application/json",Dictionary<string,string> header=null)
        {
            if (url.StartsWith("https"))
                System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

            HttpClient httpClient = new HttpClient();
            httpClient.DefaultRequestHeaders.Accept.Add(
               new MediaTypeWithQualityHeaderValue(contentType));
            if (header != null)
            {
                foreach (var item in header)
                {
                    httpClient.DefaultRequestHeaders.Add(item.Key, item.Value);
                }
            }
            HttpResponseMessage response = httpClient.GetAsync(url).Result;

            if (response.IsSuccessStatusCode)
            {
                string result = response.Content.ReadAsStringAsync().Result;
                return result;
            }
            return null;
        }

        public static T Get<T>(string url, string contentType= "application/json", Dictionary<string, string> header = null)
            where T : class, new()
        {
            T result = default(T);
            string s = Get(url, contentType, header:header);
            if (!string.IsNullOrEmpty(s))
            {
                result = JsonConvert.DeserializeObject<T>(s);
            }
            return result;
        }


        /// <summary>
        /// post请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="postData">post数据</param>
        /// <param name="contentType"></param>
        /// <param name="header"></param>
        /// <returns></returns>
        public static string Post(string url, string postData, 
            string contentType = "application/json", Dictionary<string, string> header = null)
        {
            //如果遇到是https协议的,  就指定它的安全协议
            if (url.StartsWith("https"))
                System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

            HttpContent httpContent = new StringContent(postData);
            httpContent.Headers.ContentType = new MediaTypeHeaderValue(contentType);
            HttpClient httpClient = new HttpClient();
            if (header != null)
            {
                foreach (var item in header)
                {
                    httpClient.DefaultRequestHeaders.Add(item.Key, item.Value);
                }
            }
            HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;

            if (response.IsSuccessStatusCode)
            {
                string result = response.Content.ReadAsStringAsync().Result;
                return result;
            }
            return null;
        }

        /// <summary>
        /// 发起post请求
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="url">url</param>
        /// <param name="postData">post数据</param>
        /// <returns></returns>
        public static T Post<T>(string url, string postData,
            string contentType = "application/json", Dictionary<string, string> header = null)
            where T : class, new()
        {
            T result = default(T);
            string s = Post(url, postData, contentType, header);
            if (!string.IsNullOrEmpty(s))
            {
                result = JsonConvert.DeserializeObject<T>(s);
            }
            return result;
        }

        /// <summary>
        /// V3接口全部为Xml形式，故有此方法
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="url"></param>
        /// <param name="xmlString"></param>
        /// <returns></returns>
        public static T PostXmlResponse<T>(string url, string xmlString)
            where T : class, new()
        {
            if (url.StartsWith("https"))
                System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

            HttpContent httpContent = new StringContent(xmlString);
            httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
            HttpClient httpClient = new HttpClient();

            T result = default(T);

            HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;

            if (response.IsSuccessStatusCode)
            {
                Task<string> t = response.Content.ReadAsStringAsync();
                string s = t.Result;

                result = XmlDeserialize<T>(s);
            }
            return result;
        }

        /// <summary>
        /// 反序列化Xml
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="xmlString"></param>
        /// <returns></returns>
        public static T XmlDeserialize<T>(string xmlString)
            where T : class, new()
        {
            try
            {
                XmlSerializer ser = new XmlSerializer(typeof(T));
                using (StringReader reader = new StringReader(xmlString))
                {
                    return (T)ser.Deserialize(reader);
                }
            }
            catch (Exception ex)
            {
                throw new Exception("XmlDeserialize发生异常：xmlString:" + xmlString + "异常信息：" + ex.Message);
            }

        }
    }
}
